QUESTION:

I have done the data table and don't need help with that however these are the questions I'm stuck on.

5. Where does your function graph intersect the x-axis? These points are called the zeros of the function. Notice that you are able to see the zeros in the graph of the function but not in the graph of your actual data points. What is the reason for that? Think about the differences between real data and the graph of an equation.

I said that the graph intersects at (0,0) [Link to the graph I made:

http://i43.tinypic.com/2ir3v5j.png] but I don't understand how to explain the reason why and where I can go to find out about how to determine that.